The toys absorb water and can increase to more than 400 times their original size. If swallowed, they expand and can cause a blockage in the small intestines. This may cause discomfort, vomiting, dehydration, or death. They will not show up on an X-ray. Surgery is needed to remove the toys.

The Cleveland, Ohio-based manufacturer has received one report that an 8-month-old swallowed a Water Balz and needed surgery to have it removed.

The recalled toys are sold in packages of six in green, yellow, red, blue, and black. The company name, toy name, and model number appear on the toy's package.

These include:

Water Balz (Model Number BC-0338)

Growing Skulls (Model Number BC-0320)

H2O Orbs "Despicable Me" (Model Number DM-0447)

Fabulous Flowers (Model Number BC-0440)

Water Balz and Growing Skulls were sold at Bed Bath & Beyond, Five Below, Hobby Lobby, Lakeshore Learning Materials, Microcenter, Urban Outfitters Direct, Wegmans, and other stores nationwide. They were also sold online at Amazon, Incredible Science, Keyport Hobbies, American Toy Stores, and other web sites from September 2010 through November 2012 for about $3 per package.

The H2O Orbs "Despicable Me" were sold exclusively at Universal Studios stores during June 2012 for about $3 per package. Fabulous Flowers were sold exclusively at Milaeger's in Racine, Wis., from June 2012 through November 2012 for about $3 per package.

Parents should immediately keep the toys away from children and contact the company for a free replacement toy at 800-306-4168, from 8 a.m. to 5 p.m. ET Monday through Friday, or online at Dunecraft's web site and click on the recall tab for more information.

Report any issues with the recalled toys to the U.S. Consumer Product Safety Commission at SaferProducts.gov.